This kind of attack will let you assume a users identity at a dynamically generated web page or site:

A.
SQL Injection

B.
Cross Site Scripting

C.
Session Hijacking

D.
Zone Transfer

Explanation:
Cross-site scripting (XSS) is a type of computer security vulnerability typically found in web applications which allow code injection by malicious web users into the web pages viewed by other users. Examples of such code include HTML code and client-side scripts. An exploited cross-site scripting vulnerability can be used by attackers to bypass access controls such as the same origin policy.